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Anuta_ua [19.1K]
3 years ago
13

A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. he sprays the chemical on a r

aspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. He observes insects eating the blackberry bush, but not the raspberry bush. He concludes that the chemical works. This situation is an example of?
Biology
1 answer:
Law Incorporation [45]3 years ago
7 0
What're the choices? :)
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In a cross of AaBb x AaBb, what fraction of the offspring can be expected to express one of the two dominant alleles, but not bo
Zepler [3.9K]

Answer: 1/4 (4 out of 16 offsprings express one of the two dominant alleles)

Explanation:

The dominant alleles are A and B

At the end of the cross AaBb x AaBb, 16 offsprings would result. They are as follows: AABB, AABb, AaBB, AaBb

AABb, AAbb, AaBb, AABB,

AaBB, AaBb, aaBB, aaBb,

AaBb, Aabb, aaBb, aabb.

Of all, only 4 offsprings (aaBb, aaBB, AAbb, Aabb) expresses one of the A or B. so 4/16 = 1/4

6 0
3 years ago
In addition to ATP, what types of molecules are produced in the Krebs cycle?
velikii [3]

Answer: Acetyl CoA, ATP,NADH2, PYRUVIC ACID, H20 electron carrier, Macro molecules, protein transport, nucleic acids?

Explanation:

6 0
3 years ago
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What do your observations show you about the forces exerted on objects in a collision?
Sliva [168]

Answer:

In a collision, there is a force on both objects that causes an acceleration of both objects; the forces are equal in magnitude and opposite in direction. For collisions between equal-mass objects, each object experiences the same acceleration.

plz follow me

4 0
2 years ago
Why are dog cells different? Enter your answer in the space provided.
Anton [14]

Answer:

The cell type I work with (chondrocytes) are really similar between different species. The tissue they make is very similar between species and that is why they are a great model for looking at human joint tissues. In terms of the basic elements of the cell, all animal cells are very similar, i.e. they do not have a cell wall and they have a nucleus. Dogs have different features to us because they have adapted and evolved to have the features they have. For example, when a puppy is developing, cells receive signals to move to one end of the puppy and develop the tail. A long time ago our ancestors had tails but over millions of years we have lost that feature because we don’t need it to survive.

Explanation:

6 0
2 years ago
A substrate control is what type of sample? <br>Contaminated<br>Soil<br>Rock<br>Uncontaminated
nevsk [136]
Uncontaminated. it allows researchers or forensics to compare it with another sample
6 0
3 years ago
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